نتایج جستجو برای: beam computed tomography
تعداد نتایج: 366028 فیلتر نتایج به سال:
abstract background and aim: cone beam computed tomography (cbct) produces high-quality data in periodontal diagnosis and treatment planning. the aim of this study was to compare the accuracy of cbct with intraoral digital and conventional radiography in the measurement of periodontal bone defects. methods and materials: in this diagnostic research, two hundred and eighteen artificial osseous ...
objectives: to compare the thickness of the lateral wall of the maxillary sinus in individuals with and without teeth to determine if extraction of the teeth can lead to a significant reduction in the thickness of the maxillary sinus lateral wall or not. patients and methods: in a retrospective study on fifty patients with an edentulous space, the thickness of the lateral wall of the maxillary ...
objectives: this study aimed to evaluate the location and characteristics of mental foramen, anterior loop and mandibular incisive canal using cone beam computed tomography (cbct). materials and methods: this retrospective cross-sectional study evaluated 200 mandibular cbct scans for the location of mental foramen, anterior loop prevalence and mandibular incisive canal visibility, its mean leng...
introduction: vertical root fracture (vrf) is a common failure in endodontically treated teeth. due to vrf’s poor prognosis, a reliable and valid detection method is critical for treatment planning. conventional and digital radiographs are limited in vrf detection. recently, cone beam ct (cbct) system has been introduced. this study aimed to compare the diagnostic accuracy of these three imagin...
زمینه: یکی از خطاهای رایج در تصویربرداری های پزشکی و دندانپزشکی، انحراف از موقعیت استاندارد است. مطالعه ها نشان دادهاند انحراف موقعیت فک پایین حین تصویربرداری به کمک سیتی اسکن پزشکی میتواند بر روی دقت اندازهگیری های خطی اثر منفی داشته باشد. هدف: مطالعه به منظور تعیین اثر زاویه قرارگیری سر بیمار بر اندازهگیری های زاویه ای به دست آمده از تصاویر cbct در نمونه های جمجمه های خشک انسانی انجا...
زمینه و هدف : هنگام جراحی دندان های مولر سوم نهفته در صورت نزدیکی عصب آلوئولار تحتانی به این دندان ریسک آسیب به این عصب وجود دارد. هدف از این مطالعه بررسی تأثیر عوامل مختلف بر میزان این آسیب پذیری توسط تصویربرداری (cone beam computed tomography) cbct بود. روش بررسی : رادیوگرافی cbct از 191 بیمار مراجعه کننده برای ارزیابی دقیق تر رابطه کانال مندیبولار و مولر سوم نهفته مندیبل انتخاب و موقعیت ای...
Anterior stafne bone cyst is a rare and infrequent variant located between the lower incisor and the premolar area above the insertion of the mylohyoid muscle. Stafne bone cyst is a well-defined radiolucent cavity that is usually found as an incidental finding in the radiographic examination. In this article, a rare case of anterior stafne bone cyst is reported that resembled a radicular cyst, ...
wisdom tooth operations are sometimes accompanied by complications. this case report shows complications during upper jaw third molar removal. expectable problems during oral surgery should be planned to be solved in advance. displacement of the third molar during oral surgeries as a considerable complication is rarely discussed scientifically. a good design of flap, adequate power for extracti...
central granular cell odontogenic tumor) cgcot) of the jaw is an exceedingly rare benign odontogenic neoplasm with 35 reported cases in the literature. among these, very few studies have focused on the cone-beam ct features of cgcot. here, we report a case of an asymptomatic cgcot in a 16-year-old girl and focus on the cone-beam ct features. only 36 cases of this lesion, including this one, hav...
this case report presents an eight-year-old girl having periauricular swelling and severe pain during mouth opening on the right-side temporomandibular joint (tmj). cbct showed extensive destruction of the base of the skull and the roof of the glenoid fossa on the right side. the findings based on ct and mri images with and without contrast are discussed herein. this report highlights a skull b...
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